APOLLO TELEMETRY FRAME SYNCHRONIZATION TECHNIQUES.
Abstract
An analysis has been made of data frame synchronization control for Apollo downlink telemetry. The basic objective was to determine the effects of varying the switch-controlled error tolerance thresholds of two types of existing operational equipment. Criteria for setting these error tolerance switches are presented. The criteria are established to control the average time spent in the acquisition and lock modes of the data decommutation process. Any choice of switch settings would be dependent upon the data quality and quantity requirements of a particular mission. Examples of switch setting criteria are given which depend upon 'maximum acceptable' bit error rates based on assumed operational requirements. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1967
- Accession Number
- AD0656890
Entities
People
- J. W. Mcintyre
- T. W. Coleman
Organizations
- Johns Hopkins University Applied Physics Laboratory